Lab 3 EEG1 2015-09-15a

1-11.4 2-33.8 3-25.5 4-19.4

can you explain how I can get 1.596 mg/L of concentration of Fe3+ in dilutes sample and can you also make the calibration curve.

If the peak width w of both Peak 1 and Peak 2 fro eon 1g is 0.5 minutes, what is the resolution factor between the two peaks? 1.13 Selectivity is Peak 1 (6.0 min, Peak 2 w=0.5 (6.8 min, w=0.5 25 min) min) 20 15 Hold up peak (1.8 min) 10 0. 0. 4. 8. time (minutes) 2. 5. Signal

IR Spec question: https://webbook.nist.gov/cgi/cbook.cgi?ID=B6007500&Mask=80  The spec is chloroform, deutero.  I don't know what the peaks are around 3200 cm-1, 3000 cm-1 and 2300 cm-1.

How do I find the [FeSCN]^2+ value?

I need help finding the %Composition for %cychohexane and %toluene. The formula (area of peak/total area) * 100%

1FbhGb6cd_1-5c/IV_Ivqu J4002epq/z4kbhpYZSIA opy ✩✩ IS Extensions Help I text Calibri. 12 +BIU A d f5 A % 5 T f6 1 5 J 1. Why is it recommended to have a carbon monoxide detector on each floor of a home? Page 4: Water Pollution: Questions i M 6 2. What impact would the increased use of electric vehicles have on environmental damage caused by acid rain? Page 3: More Air Pollution Issues: Questions 4. The COVID-19 pandemic forced many people to work from home for extended periods. During these periods, many cities reported unusually low levels of smog. Suggest an explanation for this observation. 5. Explain how ozone can be both harmful and beneficial. 3. Why is ground level ozone most likely to reach its highest concentrations on hot, sunny days during periods of heavy traffic in large cities? f7 Y []») 3 6. India relies heavily on burning coal to generate electricity. How does India's reliance on coal contribute to the poor air quality experienced in many of India's major cities? & 7 18…

Ayurveda is a form of medicine practiced in India. In one study, 20% of U.S.- and Indian-manufactured Ayurvedic medicines purchased through the Internet in 2005 contained detectable levels of several toxic elements. Identify as many peaks as you can in the X-ray fluorescence spectrum of the Ayurvedic medicine. Use a question mark (7) for peaks that cannot be identified. Refer to the table of X-ray fluorescence energies as needed. 49 2 000 10.55 1 800 12.63 9.99 11.84 1 600 1 400 1 200 1 000 6.40 800 25.25 9.20 13.84 600 14.20 14 76 3.70 8.73 400 28.48 4.01 7.06 15.17 200 2 3 4 5 6 7 89 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 X-ray energy (kev) X-ray fluorescence spectrum of Ayurvedic medicine [Data provided by P T. Palmer, San Francisco State University. Energy (ke V) Assignment Answer Bank 3.70 KK, KK, Ca K Se K Sc K 401 Detector response (counts/s)

Can I have some help with this chart Calculate Absorbance from % Transmittance for each Standard and the Unknown Solution using A = - log T. • Calculate the concentration of each standard based on dilution using C1V1 = C2V2 .

Timer Course Contents » ... » Data, Statistics, and Graphing » Graphing Absorbance (Optical Density) versus Molar Concentration The following table contains some data showing the effect of molar concentration of a solution on the absorbance (optical density) reading from a spectrophotometer. No ↑ Does the solution in your graph follow Beer's Law? Concentration (M) Submit Answer Incorrect. Tries 37/99 Previous Tries 0.13 0.28 0.43 0.58 0.73 0.88 1.03 1.18 1.33 1.48 What is the concentration of a solution that has an Optical Density of 0.21? (Give units in your answer). 0.21M You are correct. Your receipt no. is 155-7520 ? What is the concentration of a solution that has an Optical Density of 0.91? (Give units in your answer). 0.81 M Previous Tries Optical Density To assist in graphing, right click on this excel spreadsheet file, save it to your computer, and open it in Excel. Enter the above data in the appropriate spaces in the spreadsheet. Select the graph that is created, and print…

The aspirin we made in lab gad 125-133 melting point and I attached the IR. Base on this information, does it mean we made aspirin? The percent yield was also less than 50. Is that acceptable? Is this aspirin pure or not? please explain your answer.

Hi please answer all and below the answe place the URL from where you got the answers thank you

NAME: LAB SECTION: EXPERIMENT 21: Spectroscopy of Dyes POSTLAB EXERCISE 1. AUV/V is a spectrometer used to measure the absorbance of a solution of hemoglobin bound to oxy- gen at 590 nm. The molar absorptivity was determined to be 8.57 × 104 M-'cm-. The cuvette used had a 1.00-cm sample pathlength. The measured absorbance was ), 140. What was the concentra- tion of hemoglobin in the solution? 2. What would be the absorbance of the solution in question 1 if the pathlength were 2.00 cm? nohntooote 196

Question 19 of 27 > Graphs are a common data analysis tool used in all branches of science. The given graph represents how light absorbance at 423 nm varies with concentration of an organic dye. Identify the parts of the graph. Answer Bank y = 0.210x – 0.032 line equation Title Abs423 Dye Conc. (nM) best-fit line 0 i 2 3 4 5 6 7 8 9 10

A chemist prepared a reagent blank and 6 Fe standards with the following concentrations: 20, 30, 40, 50, 60, and 70 ppm. The table below shows the average reading of each run in the UV-Vis spectrophotometer. Concentration (ppm)-- --Absorbance (au) -0.121 20- 30--- -0.302 40- -0.468 50- -0.573 60- --0.696 70--- -0.845 Blank- -0.04 Which of the following is the correct equation for the calibration curve? (A) y = -0.1700 x + 0.01402 (B) y = 0.01402 x -0.1700 Cy=0.01402 x -0.1300 (D) y=-0.1300 x + 0.01402

Which protons are in the region from 7.0 – 8.0ppm and at 2.3ppm?

Analytes than can be trapped inside Sephadex G-25 (1,000-5000) Cytochrome C (MW=12384) Aprotinin (MW=6512) Vitamin B12 (MW=1355) Gly-gly-gly (MW=189)

Find the Concentration for a sample a, B, and C

What is ln(A) be with reference to ln(A) vs. time graph? What would 1/A be with reference to 1/A vs. time. graph? Trial 1   Time (s) Absorbance  0 0.600 30 0.522 60 0.454 90 0.392 120 0.344 150 0.300 180 0.261

A chemist prepared a reagent blank and 6 Fe standards with the following concentrations: 20, 30, 40, 50, 60, and 70 ppm. The table below shows the average reading of each run in the UV-Vis spectrophotometer. Concentration (ppm)-- -Absorbance (au) 20- -0.121 30- -0.302 40- -0.468 50- -0.573 60- -0.696 70 -0.845 Blank- -0.04 Which of the following is the correct equation for the calibration curve? (A) y = -0.1700 x + 0.01402 B y = 0.01402 x - 0.1700 C) y = -0.1300 x + 0.01402 (D) y = 0.01402 x - 0.1300

y please answer all

How do I do question #3 about correspondence between % transmittance and absorbance? Thank you

Hero expert bro Hand written solution is not allowed.

The absorbance values at 250nm of 5 standard solutions, and sample solution of a drug are given below: Conc. (ug/ml)          A 250 nm10                                0.16820.                               0.32930                                0.50840.                               0.66050                                0.846Sample.                      0.661Calculate the concentration of the sample

i need the answer quickly

%T=34% Please see attached

Using the lab instructions and data table with data, please help me complete part 1 and 2 of my lab worksheet

Which of the following statements concerning calibration curves are true? 1. A plot of signal versus analyte amount or concentration  2. Measure the response of an instrument by first measuring the response from a standard  3. Used to calibrate a measurement over an extended range.   a. 1 only b. 1 an 2 only c. 1 and 3 only d. 2 and 3 only e. 1, 2, and 3